LT8645S/LT8646S

2

8645Sfa

For more information www.linear.com/LT8645S

PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS

PG.............................................................................42V

BIAS..........................................................................25V

FB, TR/SS . .................................................................4V

SYNC/MODE Voltage . ................................................6V

(Note 1)

ORDER INFORMATION

LT8645S

LT8646S

LQFN PACKAGE

32-LEAD (6mm

× 4mm × 0.94mm)

TOP VIEW

11

12

13

14

15

16

32

31

30

29

28

27

21

17

18

19

20

26

22

23

24

25

6

10

9

8

7

1

5

4

3

2

GND

GND

GND

NC

BIAS

NC

INTVCC

GND

GND

GND

NC

RT

NC

EN/UV

33

GND

34

GND

35

GND

36

GND

37

GND

38

GND

JEDEC BOARD:

DEMO BOARD:

EXPOSED PADS (PINS 33-38) ARE GND, SHOULD BE SOLDERED TO PCB

LQFN PACKAGE

32-LEAD (6mm

× 4mm × 0.94mm)

TOP VIEW

11

12

13

14

15

16

32

31

30

29

28

27

21

17

18

19

20

26

22

23

24

25

6

10

9

8

7

1

5

4

3

2

GND

GND

GND

NC

BIAS

NC

INTVCC

GND

GND

GND

NC

RT

NC

EN/UV

33

GND

34

GND

35

GND

36

GND

37

GND

38

GND

JEDEC BOARD:

DEMO BOARD:

EXPOSED PADS (PINS 33-38) ARE GND, SHOULD BE SOLDERED TO PCB

http://www.linear.com/product/LT8645S#orderinfo

PART NUMBER

PART MARKING*

FINISH CODE

PAD FINISH

PACKAGE TYPE**

MSL

RATING

TEMPERATURE RANGE

LT8645SEV#PBF

8645SV

e4

Au (RoHS)

LQFN (Laminate Package

with QFN Footprint)

3

–40°C to 125°C

LT8645SIV#PBF

LT8646SEV#PBF

8646SV

LT8646SIV#PBF

• Consult Marketing for parts specified with wider operating temperature

ranges. *Device temperature grade is indicated by a label on the shipping

container.

• Pad finish code is per IPC/JEDEC J-STD-609.

• Terminal Finish Part Marking: www.linear.com/leadfree

• Recommended PCB Assembly and Manufacturing Procedures:

www.linear.com/umodule/pcbassembly

• Package and Tray Drawings: www.linear.com/packaging

Parts ending with PBF are RoHS and WEEE compliant. **The LT8645S/LT8646S package has the same footprint as a standard 6mm × 4mm QFN Package.

Operating Junction Temperature Range (Note 2)

LT8645SE/LT8646SE......................... –40°C to 125°C

LT8645SI/LT8646SI........................... –40°C to 125°C

Storage Temperature Range .................. –65°C to 150°C

Maximum Reflow (Package Body) Temperature ...260°C